As a tool to evaluate new equipment or try new rig settings, VMG can be very usefull. The Velocitek units are great because they have a simple VMG readout. It is not exact as the wind often is variable, but it provides instant readings as opposed to looking at plots later on.

As a race tool I find the use of a GPS a big detriment. It is just 1 more thing keeping my head from being in the race and stuck in the boat. VMG does not tell you the favored side of the course, if the wind is variable, the readings are misleading, and it definitely does not help you be tactical with respect to your competition.

A lot of classes have restrictions in their rules about extra electronic or measuring gear. Some only allow the use of a simple compass, while others are even more restrictive and only a countdown watch is allowed. I am not necesarily in favor of banning anything as I feel they are not a help anyway, but it is something to consider in the championship rules.

Matt